445521416 has 16 divisors (see below), whose sum is σ = 855727740. Its totient is φ = 217327360.

The previous prime is 445521407. The next prime is 445521421. The reversal of 445521416 is 614125544.

It can be written as a sum of positive squares in 2 ways, for example, as 377524900 + 67996516 = 19430^2 + 8246^2 .

It is a super-2 number, since 2×445521416² = 396978664229290112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678821 + ... + 679476.

Almost surely, 2^445521416 is an apocalyptic number.

It is an amenable number.

445521416 is a deficient number, since it is larger than the sum of its proper divisors (410206324).

445521416 is a wasteful number, since it uses less digits than its factorization.

445521416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358344 (or 1358340 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 445521416 is about 21107.3782360576. The cubic root of 445521416 is about 763.7587434834.

The spelling of 445521416 in words is "four hundred forty-five million, five hundred twenty-one thousand, four hundred sixteen".